<div class="center-block" style="width: 300px;">
  <img src="<?php echo $this->baseUrl('img/cun.png')?>" class="center-block" />
  <form method="post" role="form" action="<?php echo $this->baseUrl('usuarios/seguridad/login')?>">
    <h2>Ingreso al sistema</h2>
    <div class="input-group">
      <span class="input-group-addon"><span class="glyphicon glyphicon-user"></span></span>
      <input type="text" name="usu" class="form-control" placeholder="Usuario" required autofocus>
    </div>
    <div class="input-group">
      <span class="input-group-addon"><span class="glyphicon glyphicon-lock"></span></span>
      <input type="password" name="cla" class="form-control" placeholder="Clave de acceso" required>
    </div>
    <button class="btn btn-lg btn-primary btn-block" type="submit" style="margin-top: 10px;">Enviar</button>
  </form>
</div>
